Re: Motor Circuit

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "John Hansford" <kz1927@...>
wrote:

>
> Hi Jon,
>
> Yes, for a small DC motor, or universal. Hobby-type stuff.
> Is the circuit any use for that? Can it be adjusted for say
> a 300w DC motor? To drive a spindle. I use a trim router, but
> it's too loud and dusty cutting MDF.
>

The first chip I looked at was the 2N4901 evidently, it is not a
current part.

I think If that is the case, then someone would need to go over the
whole schematic and make sure every part is available and that each
replacement is used with the properly sized supporting circuitry.

I would think using the $10.00 manual router speed control from Homier
would be a safer bet.

I do like the idea of a feedback to maintain RPM though.

Dave